Adds issue template.

Author: ryasmi

.github/issue_template.md

@@ -0,0 +1,19 @@
+You need to replace the parts of this template where you see {{some text}}.
+
+**Version**
+{{branch}} at {{commit}} on {{version - found in your copy of the VERSION file}} 
+
+**Steps to reproduce the bug**
+1. {{step 1}}
+2. {{step 2}}
+
+**Expected behaviour**
+{{feature}} should be {{expectedResult}} because {{reason}}.
+
+**Actual behaviour**
+{{feature}} is {{actualResult}}.
+
+**Additional information**
+OS: {{operatingSystem}}
+Browser: {{browser}} version 1.0.1
+{{additionalInfo}}